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Technical Note / White Paper

Discontinued Product
RTC-4701JE (Built-in Temperature Sensor Serial-Interface Real Time Clock Module)

  • Built in frequency adjusted 32.768kHz crystal unit.
  • Interface Type
    3-wire serial interface
  • Operating voltage range
    1.6V to 5.5V
  • Wide Timekeeper voltage range
    1.6V to 5.5V
  • Built-in temperature sensor
    Detects temperature.
    Converts output to analog voltage
  • 32.768kHz frequency output function
    C-MOS output With Control Pin
  • Function of time and calendar, the various interrupt function etc.

Complies with EU RoHS directive.

RTC-4701JE
RTC-4701JE

RTC-4701NB
RTC-4701NB

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RoHSpdf

REACH pdf

Brief Sheet pdf

Application Manual pdf (214KB)

Block diagram

Block diagram

Overview

  • Built-in temperature sensor
    • Diode temperature sensor (analog voltage output)
    • * temperature sensor operating voltage:2.7V to 5.5V
    • * temperature sensor tolerance:±5°C(Ta=+25°C)
    • * voltage output (analog):-7.6mV/°C Typ.
  • 32.768kHz frequency output function
    • FOUT pin output (C-MOS output), CL=30pF
    • FOE pin enables output on/off control.
  • The various interrupt function
    • 12bit additional counter.(to 4095count)
    • Timer function can be set up between 1/4096second and 255minutes.
    • Alarm function can be set to day of week, hour, or minute.

Pin function

Signal Name Input/Output Function
CE Input The chip enabled input pin.
(Built -in pull-down resistance)
CLK Input The shift clock input pin for serial data transfer.
DATA Bi-directional The data input / output pin for serial data transfer.
FOUT Output
FOE input FOUT output
HIGH 32.768kHz output * C-MOS output
LOW output OFF * Hi - z
FOE Input
VTEMP Output The voltage output pin for the temperature sensor (analog).
/SOFF Input The input pin for the temperature sensor control.
/ AIRQ Output Output 1 pin (N-ch open drain)
/ TIRQ Output Output 2 pin (N-ch open drain)
VDD - Connected to a positive power supply.
GND - Connected to a ground.

Terminal connection / External dimensions

Terminal connection External dimensions

(Unit: mm)

Metal may be exposed on the top or bottom of this product. This will not affect any quality, reliability or electrical spec.

Temperature sensor characteristics *Refer to application manual for details.

* If not specifically indicated, GND=0V,VDD=2.7V to 5.5V,Ta=-40°C to +85°C

Item Symbol Condition Min. Typ. Max. Unit
Temperature
output voltage		 VTEMP VTEMP pin,Ta=+25°C
GND based output voltage		 1.480 V
Output
tolerance		 TACR Ta=+25°C ±5.0 °C
Temperature
sensitivity		 VSE -40°C ≤ Ta ≤ +85°C -7.1 -7.6 -8.1 mV/°C
Linearity ΔNL -40°C ≤ Ta ≤ +85°C ±2.0 %
Temperature
detection
range		 TSOP ΔNL ≤ ±2.0% -40 +85 °C
Output
resistance		 RO VTEMP pin,Ta=+25°C
GND standard and VDD standard		 1.0 3.0 kΩ

Temperature sensor characteristics1

Temperature sensor characteristics2

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